L ^ ] 



PART III.— July, 1876. 



VI. On thirty-one Species of Marine Planarians, collected partly by the late Dr. Kelaart, 



F.L.S., at Trincomalee, and partly by Dr. Collingwood, F.L.S., in the Eastern 

 Seas. By Dr. Cuthrert Collingwood. (Plates XVII.-XIX.) . . page 83 



VII. On the Structure and Development of the Bird's Skull. By W. K. Parker, 



F.B.S., F.L.S., 8j-c. (Part II.) (Plates XX.-XXVII.) 99 



PART IV.— January, 1877. 



VIII. A Monograph of the Lepidopterous Genus Castnia and some allied Groups. By 

 Prof. J. O. Westwood, M.A., F.L.S., 8fc. (Plates XXVIII.-XXXIIL). . 155 



IX. On a new Genus of Treniatoda, and some new or little-known Parasitic Sirudinei. 



By John Denis Macdonald, M.D., F.B.S., Deputy Inspector-General B.N., 

 Professor of Naval Hygiene Army Medical School. {Communicated by G. E. 

 Dobson, M.A., M.B., F.B.S.) (Plate XXXIV.) 209 



X. On the Osteology and Pterylosis of the Spoon-billed Sandpiper (Eurynorbyncbus 



pygniseus, Linn.). By John Anderson, M.D., F.B.S.F., F.L.S., F.Z.S., Sfc, 

 Curator of Indian Museum and Professor of Comparative Anatomy at Medical 

 College, Calcutta. (Plate XXXV. and 2 Woodcuts.) 213 



PART V— October, 1877. 



XL On Steere's Sponge, a new Genus of the Seccactinellid Group of the Spongida. By 

 James Mtjrie, M.D., F.L.S., F.G.S., fyc. (Plates XXXVI. & XXXVII. and 2 

 Woodcuts.) 219 



XII. Notes upon the Oxystomatous Crustacea. By Edward J. Miers, F.L.S., F.Z.S., 



Assistant in the Zoological Department, British Museum. (Plates XXXVIII.- 

 XL.) 235 



XIII. On the Domestic Pig of Prehistoric times in Britain, and on the mutual Belations 

 of this Variety of Pig and Sus scrofa ferus, Sus cristatus, Sus andamanensis, and 

 Sus barbatus. By George Rolleston, M.D., F.B.S. , F.L.S., Linacre Professor 

 of Anatomy and Physiology, Oxford. (Plates XLI.-XLIII.) 251 



